EHEIM substrat: Bio filter medium with high biological performance. After the mechanical treatment of the water by EHEIM Mech, the water is biologically filtered with EHEIM substrat in one or several layers. substrat is a highly porous filter medium consisting of sintered glass. Its surface structure offers excellent colonization conditions to the important purification bacteria. The adhesive surface amounts to 450 sq. m per liter, thus biologically filtering the water. EHEIM substrat can be rinsed out and can be used several times.
Available as 1 litre, 2 litre and 5 litre.